In this paper, we apply m-polar fuzzy set to hyper BCKalgebra. We introduce the notions of k-polar fuzzy hyper BCK-ideal, k-polar fuzzy weak hyper BCK-ideal, k-polar fuzzy s-weak hyper BCK-ideal, k-polar fuzzy strong hyper BCK-ideal and k-polar fuzzy reflexive hyper BCKideal, and investigate related properties and their relations. We discuss k-polar fuzzy (weak, s-weak, strong, reflexive) hyper BCK-ideal in relation to k-polar level set.
Article InformationThe hyper algebraic structure was introduced by F. Marty [14] in 1934. Bolurian et al. [5] was introduced hyper BCK-algebra as an extension of BCK-algebra. Since then, many scholars have been studying hyper BCK-algebra and its infrastructure and so on. In addition, research using fuzzy and soft set is actively being carried out (see [4], [7], [8], [9], [11]). In 2014, Chen et al. [6] introduced an m-polar fuzzy set which is an extension of bipolar fuzzy set. The m-polar fuzzy set applied to decision making problem (see [1]) and BCK/BCI-algebra (see [2,3,15]).The notion of m-polar fuzzy set is applied to hyper BCK-algebra. The concepts of k-polar fuzzy (weak, s-weak, strong, reflexive) hyper BCK-ideal are introduced, and the relations and properties are investigated in relation to k-polar level set.
PreliminariesLet H be a nonempty set endowed with a hyperoperation "•". For two subsets A and B of H, denote by A • B the set a∈A,b∈B a • b. We shall use x • y instead of x • {y}, {x} • y, or {x} • {y}.By a hyper BCK-algebra (see [13]) we mean a nonempty set H endowed with a hyperoperation "•" and a constant 0 satisfying the following axioms: